Illinois Law Mandates Safety Studies at Fatal Intersections

Newly adopted legislation mandates a traffic study for all pedestrian fatalities and consideration of alternate road design options.

1 minute read

August 29, 2021, 7:00 AM PDT

By Diana Ionescu @aworkoffiction


Chicago, Illinois

Dennis O'Neil / Shutterstock

"Despite a decrease in miles driven, last year the nation saw the highest number of traffic deaths in thirteen years," writes Courtney Cobbs, with fatalities increasing seven percent between 2019 and 2020. In Illinois, that number was 16 percent. "Tragically, in Chicago, on-street fatalities spiked by a full 45 percent last year."

"During the last state legislative session, state representatives unanimously passed SB 1791, a bill with the goal of reducing pedestrian fatalities on state roads." The bill "mandates that the Illinois Department of Transportation conduct a traffic study following 'the occurrence of any [crash] involving a pedestrian fatality that occurs at an intersection of a state highway. The study shall include, but not be limited to, consideration of alternative geometric design improvements that the Department deems necessary.'" The bill supposedly also includes cyclists.

According to Cobbs, the bill has a few issues: "there’s no funding mechanism attached to the bill to ensure that corrections are made to prevent future crashes," and "while the mandate to conduct a traffic study sounds good, it ignores the larger issue of the engineering formulas used to design our roads. Oftentimes these formulas put driver convenience and speed ahead of safety for all road users."

Wednesday, August 25, 2021 in Streetsblog Chicago

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 2, 2025 - Diana Ionescu

Map of Haussmann's redesign of Paris in the 1850s through 1870s under Napoleon III.

In Urban Planning, AI Prompting Could be the New Design Thinking

Creativity has long been key to great urban design. What if we see AI as our new creative partner?

June 30, 2025 - Tom Sanchez

Street with parking protected bike lane and parked cars in downtown Portland, Oregon.

Portland Raises Parking Fees to Pay for Street Maintenance

The city is struggling to bridge a massive budget gap at the Bureau of Transportation, which largely depleted its reserves during the Civd-19 pandemic.

7 hours ago - Willamette Week

Aerial view of Spokane, Washington with river in foreground.

Spokane Mayor Introduces Housing Reforms Package

Mayor Lisa Brown’s proposals include deferring or waiving some development fees to encourage more affordable housing development.

July 8 - The Spokesman-Review

Close-up on black and white "Bike Lane Ends" sign with bike logo.

Houston Mayor Kills Another Bike Lane

The mayor rejected a proposed bike lane in the Montrose district in keeping with his pledge to maintain car lanes.

July 8 - Houston Public Media

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.

Associate/Senior Planner

Gallatin County Department of Planning & Community Development

Senior Planner

Heyer Gruel & Associates PA